8 research outputs found
ΠΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΠΈ Π²ΡΡΠΎΠΊΠΎΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ½ΠΎΠΉ ΠΌΠΎΠ½ΠΎΠ΄ΠΎΠΌΠ΅Π½ΠΈΠ·Π°ΡΠΈΠΈ ΠΊΠΎΠ½Π³ΡΡΡΠ½ΡΠ½ΡΡ ΡΠ΅Π³Π½Π΅ΡΠΎΡΠ»Π΅ΠΊΡΡΠΈΡΠ΅ΡΠΊΠΈΡ ΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠ² ΡΠ²Π΅ΡΠ΄ΠΎΠ³ΠΎ ΡΠ°ΡΡΠ²ΠΎΡΠ° LiNb0,5Ta0,5O3
Lithium niobate and lithium tantalate are among the most important and most widely used materials in acousto-optics and acoustoelectronics. These materials have high values of piezoelectric constants, which makes it possible to use these materials as actuators; however, their use is limited by the thermal instability of a lithium niobate crystal and the low Curie temperature (TC) of a lithium tantalate crystal. LiNb(1-x)TaxO3 crystals have to overcome the aforementioned limitations of individual compounds.Crystals LiNb0.5Ta0.5O3 were grown by the Czochralski method, of good quality. Comparative studies of the features of high-temperature single domainization of LiNb0.5Ta0.5O3 crystals have been carried out. The main differences in the technological regimes for single-domainization of congruent LiNb0.5Ta0.5O3 crystals from congruent LiNbO3 crystals are demonstrated. The parameters of high-temperature electrodiffusion processing LiNb0.5Ta0.5O3 crystals are presented, which make it possible to obtain single-domain crystals for further study of their physical properties.ΠΠΈΠΎΠ±Π°Ρ ΠΈ ΡΠ°Π½ΡΠ°Π»Π°Ρ Π»ΠΈΡΠΈΡ ΠΎΡΠ½ΠΎΡΡΡΡΡ ΠΊ Π²Π°ΠΆΠ½Π΅ΠΉΡΠΈΠΌ ΠΈ Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ ΡΠΈΡΠΎΠΊΠΎ ΠΏΡΠΈΠΌΠ΅Π½ΡΠ΅ΠΌΡΠΌ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π°ΠΌ Π² Π°ΠΊΡΡΡΠΎΠΎΠΏΡΠΈΠΊΠ΅ ΠΈ Π°ΠΊΡΡΡΠΎΡΠ»Π΅ΠΊΡΡΠΎΠ½ΠΈΠΊΠ΅. ΠΡΠΈ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Ρ ΠΎΠ±Π»Π°Π΄Π°ΡΡ Π±ΠΎΠ»ΡΡΠΈΠΌΠΈ Π·Π½Π°ΡΠ΅Π½ΠΈΡΠΌΠΈ ΠΏΡΠ΅Π·ΠΎΡΠ»Π΅ΠΊΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΊΠΎΠ½ΡΡΠ°Π½Ρ, ΡΡΠΎ ΠΏΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°ΡΡ ΠΈΡ
Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ Π°ΠΊΡΡΠ°ΡΠΎΡΠΎΠ². ΠΠ΄Π½Π°ΠΊΠΎ ΠΈΡ
ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΎΠ³ΡΠ°Π½ΠΈΡΠ΅Π½ΠΎ ΡΠ΅ΡΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ Π½Π΅ΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΡΡΡΡ ΠΊΡΠΈΡΡΠ°Π»Π»Π° Π½ΠΈΠΎΠ±Π°ΡΠ° Π»ΠΈΡΠΈΡ ΠΈ Π½ΠΈΠ·ΠΊΠΎΠΉ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠΎΠΉ ΠΡΡΠΈ TC ΠΊΡΠΈΡΡΠ°Π»Π»Π° ΡΠ°Π½ΡΠ°Π»Π°ΡΠ° Π»ΠΈΡΠΈΡ. ΠΡΠ΅ΠΎΠ΄ΠΎΠ»Π΅ΡΡ ΡΡΠΈ Π½Π΅Π΄ΠΎΡΡΠ°ΡΠΊΠΈ, Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠ½ΡΠ΅ Π΄Π»Ρ ΠΎΡΠ΄Π΅Π»ΡΠ½ΡΡ
ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠΉ, ΠΌΠΎΠΆΠ½ΠΎ ΠΏΡΡΠ΅ΠΌ ΠΏΠΎΠ»ΡΡΠ΅Π½ΠΈΡ ΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠ² LiNb1-xTaxO3. ΠΠ΅ΡΠΎΠ΄ΠΎΠΌ Π§ΠΎΡ
ΡΠ°Π»ΡΡΠΊΠΎΠ³ΠΎ Π²ΡΡΠ°ΡΠ΅Π½Ρ ΠΊΡΠΈΡΡΠ°Π»Π»Ρ LiNb0,5Ta0,5O3 Ρ
ΠΎΡΠΎΡΠ΅Π³ΠΎ ΠΊΠ°ΡΠ΅ΡΡΠ²Π°. ΠΡΠΎΠ²Π΅Π΄Π΅Π½Ρ ΡΡΠ°Π²Π½ΠΈΡΠ΅Π»ΡΠ½ΡΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΠ΅ΠΉ Π²ΡΡΠΎΠΊΠΎΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ½ΠΎΠΉ ΠΌΠΎΠ½ΠΎΠ΄ΠΎΠΌΠ΅Π½ΠΈΠ·Π°ΡΠΈΠΈ ΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠ² LiNb0,5Ta0,5O3. ΠΡΠΎΠ΄Π΅ΠΌΠΎΠ½ΡΡΡΠΈΡΠΎΠ²Π°Π½Ρ ΠΎΡΠ½ΠΎΠ²Π½ΡΠ΅ ΠΎΡΠ»ΠΈΡΠΈΡ Π² ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ΅ΠΆΠΈΠΌΠ°Ρ
ΠΏΡΠΈ ΠΌΠΎΠ½ΠΎΠ΄ΠΎΠΌΠ΅Π½ΠΈΠ·Π°ΡΠΈΠΈ ΠΊΠΎΠ½Π³ΡΡΡΠ½ΡΠ½ΡΡ
ΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠ² LiNb0,5Ta0,5O3 ΠΎΡ ΠΊΠΎΠ½Π³ΡΡΡΠ½ΡΠ½ΡΡ
ΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠ² LiNbO3. ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Ρ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡ Π²ΡΡΠΎΠΊΠΎΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ½ΠΎΠΉ ΡΠ»Π΅ΠΊΡΡΠΎΠ΄ΠΈΡΡΡΠ·ΠΈΠΎΠ½Π½ΠΎΠΉ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ ΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠ² LiNb0,5Ta0,5O3, ΠΏΠΎΠ·Π²ΠΎΠ»ΡΡΡΠΈΠ΅ ΠΏΠΎΠ»ΡΡΠ°ΡΡ ΠΌΠΎΠ½ΠΎΠ΄ΠΎΠΌΠ΅Π½Π½ΡΠ΅ ΠΊΡΠΈΡΡΠ°Π»Π»Ρ Π΄Π»Ρ Π΄Π°Π»ΡΠ½Π΅ΠΉΡΠ΅Π³ΠΎ ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ ΠΈΡ
ΡΠΈΠ·ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ²ΠΎΠΉΡΡΠ²
ΠΠΠ Π‘ΠΠΠΠ’ΠΠΠΠ«Π ΠΠΠ’ΠΠ ΠΠΠΠ« ΠΠΠ£Π‘Π’ΠΠΠΠΠΠ’Π ΠΠΠΠΠ
Multicomponent piezoelectric crystals of langasite family wereΒ studied. The process of crystal growth and crystal structure wereΒ investigated. Xβray diffraction and topography were used to studyΒ the acoustic properties of crystals. The possibility of applicationΒ of the piezoelectric crystals in highβtemperature SAWβsensorsΒ was demonstrated.ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΌΠ½ΠΎΠ³ΠΎΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½ΡΠ½ΡΡ
Β ΠΏΡΠ΅Π·ΠΎΡΠ»Π΅ΠΊΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠ² Π³ΡΡΠΏΠΏΡ Π»Π°Π½ΡΠ°Π½Π³Π°Π»Π»ΠΈΠ΅Π²ΠΎΠ³ΠΎΒ ΡΠΈΠ»ΠΈΠΊΠ°ΡΠ° (Π»Π°Π½Π³Π°ΡΠΈΡΠ°). ΠΠ·ΡΡΠ΅Π½ΡΒ ΠΏΡΠΎΡΠ΅ΡΡΡ ΡΠΈΠ½ΡΠ΅Π·Π° ΠΈ ΡΡΡΡΠΊΡΡΡΠ°Β ΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠ². Π‘ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌΒ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ² ΡΠ΅Π½ΡΠ³Π΅Π½ΠΎΠ²ΡΠΊΠΎΠΉ ΡΠΎΠΏΠΎΠ³ΡΠ°ΡΠΈΠΈ ΠΈ Π΄ΠΈΡΡΠ°ΠΊΡΠΎΠΌΠ΅ΡΡΠΈΠΈ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Ρ Π°ΠΊΡΡΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π°ΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠ². ΠΡΠΎΠ΄Π΅ΠΌΠΎΠ½ΡΡΡΠΈΡΠΎΠ²Π°Π½Π° Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΡ ΡΡΠΈΡ
Β ΠΏΡΠ΅Π·ΠΎΡΠ»Π΅ΠΊΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠ² Π²Π²ΡΡΠΎΠΊΠΎΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ½ΡΡ
ΡΠ΅Π½ΡΠΎΡΠ½ΡΡ
Β ΡΡΡΡΠΎΠΉΡΡΠ²Π°Ρ
Π½Π° ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΡΡ
Β Π°ΠΊΡΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
Π²ΠΎΠ»Π½Π°Ρ
High-temperature poling treatment of congruent ferroelectric LiNb0.5Ta0.5O3 solid solution single crystals
Lithium niobate and tantalate are among the most important and widely used materials of acoustooptics and acoustoelectronics. They have high piezoelectric constants enabling their use as actuators. Their use is however restricted by the thermal instability of lithium niobate crystals and the low Curie temperature TC of lithium tantalate crystals. Overcoming these drawbacks typical of some compounds is possible by growing LiNb1-xTaxO3 single crystals. Good quality LiNb1-xTaxO3 single crystals have been grown using the Czochralsky technique. High-temperature poling process of LiNb1-xTaxO3 single crystals has been studied. The main differences between the process modes required for poling of congruent LiNb1-xTaxO3 single crystals and congruent LiNbO3 single crystals have been demonstrated. Parameters of high-temperature electric diffusion processing of LiNb1-xTaxO3 single crystals that provide for singledomain crystals for further study of physical properties have been reported